Complex Data Types
A data type can either be simple or complex. Simple data types include the data types discussed in the previous section. Complex data types contain the child elements that belong to an element, as well as all the attributes that are associated with the element. If you visit http://www.w3.org/TR/xmlschema-1/, you'll find the first schema specification. Combining this specification with that for simple data types, you will have the complete schema specification. Our discussion of complex data types in this section will include an explanation of all of the elements of a schema, a sample DTD for a schema, and numerous examples showing how to create a schema and complex data types.